
R
you switch on the turn signals. In this
event, the warnings are suppressed for a
certain period of time.
R a driving safety system intervenes, e.g.
ABS, BAS or ESP ®
.
R you accelerate hard, e.g. kickdown.
R you brake hard.
R you steer actively, e.g. swerve to avoid an
obstacle or change lanes quickly.
R you cut the corner on a sharp bend.
In order that you are warned only when nec-
essary and in good time if you cross the lane marking, the system recognizes certain con-
ditions and warns you accordingly.
The warning vibration occurs earlier if:
R you approach the outer lane marking on a
bend.
R the road has very wide lanes, e.g. a high-
way.
R the system recognizes solid lane markings.
The warning vibration occurs later if:
R the road has narrow lanes.
R you cut the corner on a bend. PLUG-IN HYBRID operation
Points to remember
General notes Hybrid technology combines a fuel efficient
internal combustion engine with a powerful
electric motor. In HYBRIDmode, the hybrid
system automatically selects the most effi-
cient operating mode for every driving situa-
tion. Drive the vehicle in the usual manner.
To save fuel, in HYBRIDmode, the hybrid
system switches off the combustion engine
as often as possible during the journey when power output requirements are low. When
power output requirements are low, the elec-
tric motor powers the vehicle. The engine is
switched on, even while the vehicle is in
motion, when a higher power output is
required. The engine is usually switched off when the vehicle is stationary. Consequently,
there is usually no engine idling as with com-
bustion engine vehicles.
For pulling away and accelerating, the electric motor supports the internal combustion
engine using the power stored in the high-
voltage battery. This energy is also used for
driving in partially electric mode, to operate
the electric refrigerant compressor and sup-
port the 12 V on-board electrical system. In
this way the hybrid drive helps to reduce your
vehicle's fuel consumption.
Observe the driving tips on PLUG-IN HYBRID
operation (Y page 287).
Recuperative Brake System If you release the accelerator pedal when the
vehicle is in motion, overrun recuperation is
initiated. The electric motor is operated as a
generator when in overrun mode and when
you brake. Hybrid technology converts the
kinetic energy of the vehicle into electricity
and stores it in the high-voltage battery.
Observe the important safety notes for the
Recuperative Brake System (Y page 48). Important safety notes
If the engine is switched off by the ECO start/
stop function and you open the driver's door:
R a message appears in the multifunction dis-
play and
R a warning tone sounds
Further information (Y page 340).
All of the vehicle's systems remain active, if:
R the vehicle is stationary
R the combustion engine is switched off and
R the READY indicator in the instrument clus-
ter lights up
If you remove your foot from the brake pedal
while in transmission position D or R, the
vehicle may pull away automatically.
Observe the notes on the READY display of
the ECO start/stop function (Y page 288).276
PLUG-IN HYBRID operationDriving and pa
rking

Instrument cluster
:
Recuperative Brake System warning lamp (Y page 366)
; Electric motor performance display (Y page 279)
= Condition of charge display for high-voltage battery (Y page 281)
? Driving mode display (Y page 280)
A Electrical range Displays and operation
Electric motor performance display The power display for the electric motor is
located on the right-hand side of the instru-
ment cluster.
The current condition of charge of the high-
voltage battery is shown as a percentage in
condition of charge display A. 100% corre-
sponds to the highest possible condition of
charge of the high-voltage battery. There are two further areas located to the left
and right of condition of charge display A:
R Area :to; (E-DRIVE):
This shows the electric output from the
electric motor, e.g. during electric opera-
tion or in boost mode.
When the motor is switched on, the display is at lower limit ;. With increasing pres-
sure on the accelerator pedal the display
fills up from ;to:.
Driving with the electric motor: when the
display reaches upper limit :, the com-
bustion engine is switched on. If the display is approaching upper limit :and you
remove your foot from the accelerator
pedal, the display empties again. The com- bustion engine is not switched on. At low
speeds, you can thereby control the elec-
tric operation usage so that you only drive
in electric mode.
Driving with the combustion engine: the
electric motor supports the combustion PLUG-IN HYBRID operation
279Driving and parking Z

engine by providing additional torque
(boost mode) until the display reaches
upper limit
:.
You can also select the operating mode of
the hybrid system (Y page 280).
R Area =to? (CHARGE):
This shows the recuperated energy which is stored in the high-voltage battery as elec-
trical energy.
When the display reaches lower limit ?,
the maximum recuperative braking power
has been exhausted. The mechanical brake is activated.
Selecting the operating mode Button
:allows you to choose between dif-
ferent operating modes.
X Press button :to change the operating
mode.
The operating mode selected appears in
the instrument cluster (Y page 279).
If it is not possible to change operating
modes, the display message Change
Change the the
current drive program before
current drive program before
changing the operating mode. changing the operating mode. or
Exit
Exit manual
manual drive
driveprogram
program M
Mbefore
before
changing the operating mode.
changing the operating mode.
appears in the multifunction display. Fur-
ther information on "Display messages"
(Y page 340). :
Operating mode selected
; Operating mode unavailable
= Operating mode available HYBRID R
Electric mode or driving
with the internal com-
bustion engine is possi-
ble
R Automatic selection of
drive mode with electric
mode as often as possi-
ble
R The high-voltage battery
is discharged to approx-imately 20%.
R To subsequently main-
tain the condition of
charge of the high-volt-
age battery, the electric
output is reduced. All
vehicle functions such
as electric mode,
energy recuperation or
boost mode, for exam-
ple, are still available. E-MODE R
Electric-only drive
R Electrical power output
allotted using the haptic
accelerator pedal
(Y page 286)
R Internal combustion
engine activation using
the haptic accelerator
pedal 280
PLUG-IN HYBRID operationDriving and parking

E-SAVE R
Electric mode or driving
with the internal com-
bustion engine is possi-
ble
R Automatic selection of
drive mode with electric
mode as often as possi-
ble
R The current condition of
charge of the high-volt-
age battery is main-
tained so the electrical
energy can be used at a
later time. CHARGE R
Electric drive is not pos-
sible
R Charging the high-volt-
age battery while driv-
ing using the combus-
tion engine In automatic drive program
S(Y page 285)
and in manual drive program M(Y page 286),
only HYBRID operating mode is available.
If you switch from automatic drive program S
to automatic drive program Eor E+ ,HYBRID
operating mode continues to be selected.
If manual drive program Mis deactivated, the
automatic transmission shifts:
R into the automatic drive program that was
last selected
R into the driving mode that was last selected
Operating the on-board computer You can display the current operating condi-
tion of the hybrid system in the multifunction
display and the COMAND display
(Y page 281).
In the COMAND display, you can also call up a graphic display of the fuel consumption and
generated electricity (Y page 285). Menus and submenus
Selecting displays in the COMAND dis-
play X
Press button Øon the controller.
The vehicle menu is displayed.
X To select Energy EnergyFlow
Flow: turn and press the
controller.
The energy flow is displayed.
X To select Consumption Consumption: turn and press the
controller.
Fuel consumption and the generated elec-
tric energy are displayed.
X To exit the display: press the %button
on the controller.
Selecting the energy flow display in the
multifunction display X
Use Ñ on the steering wheel to call up
the list of menus.
X Press the :or9 button on the steer-
ing wheel to select the Trip Tripmenu.
X Confirm by pressing aon the steering
wheel.
X Use : or9 to select Energy Flow
Energy Flow .
The active hybrid components are highligh-
ted in the energy flow display.
Energy flow display Overview
:
Internal combustion engine
; Electric motor
= High-voltage battery condition of charge PLUG-IN HYBRID operation
281Driving and parking Z

Electric operation mode and charging the
high-voltage battery The electric motor is operating as a genera-
tor, e.g. in overrun mode and when braking.
The kinetic energy of the vehicle is converted into electrical energy. The high-voltage bat-
tery is being charged.
The arrows for the energy flow are shown in
green.
Charging the high-voltage battery when
stationary The engine and electric motor are switched
off.
The arrows for the energy flow are not shown.
Further information on charging the high-volt-
age battery via:
R a mains socket (Y page 212)
R a charging station (Y page 216)
R a wallbox (Y page 215) Displaying the total range and electrical
range The approximate range is based on the cur-
rent driving style.
X Use Ñ on the steering wheel to call up
the list of menus.
X Press the :or9 button on the steer-
ing wheel to select the Trip
Trip menu.
X Confirm by pressing aon the steering
wheel.
X Press :or9 to select the approxi-
mate total range and electrical range. 284
PLUG-IN HYBRID operationDriving and parking

Displaying fuel consumption and generated electricity
:
Fuel consumption
; Electrical energy generated
Every bar of the graph displays the average value for one minute.
Fuel consumption indicator :may differ from the indicator in the From
FromStart
Start trip computer
in the Trip
Trip menu.
To reset values: the values are reset along with the From
FromStart
Start trip computer (Y page 300).
X To select Consumption
Consumption: turn and press the controller.
Fuel consumption :and electrical energy ;generated for the last 15 minutes are shown
in the COMAND display. Starting the engine
The vehicle starts in electric mode without the
internal combustion engine (noiseless start).
The internal combustion engine starts only
after the power demanded by the driver
exceeds the available power that the electric motor can currently provide.
Noiseless start operation is dependent on the
outside temperature and the operating tem-
perature of the internal combustion engine. If
not all conditions for noiseless start operation are fulfilled, the vehicle starts with the inter-
nal combustion engine. X
Switch on the ignition.
X Depress the brake pedal.
X Observe the notes on starting the engine
(Y page 191).
X Start the vehicle (Y page 192).
The vehicle is operational when READY indi-
cator :lights up. Pulling away
X Depress the brake pedal and keep it
depressed.
X Shift the transmission to position Dor R.
X If the Apply Brake to Shift from 'P' Apply Brake to Shift from 'P'
display message appears in the multifunc-
tion display, depress the brake pedal more firmly and select the desired transmission
position.
X Release the brake pedal.
X Carefully depress the accelerator pedal.
For further information on pulling away
(Y page 192). Driving
Program selector button Automatic drive programs E, S and E+ PLUG-IN HYBRID ope
ration
285Driving an d parking Z

X
Press program selector button :to
change the drive program.
The selected drive program appears in the
multifunction display.
The program selector button allows you to
choose between different driving character-
istics. E
Economy R
Comfortable, economi-
cal driving
R Electric operation mode
is used as often as pos-
sible
R The ECO start/stop
function is available S
Sport R
Sporty driving style with
boost mode
R The internal combus-
tion engine is always
switched on E+
Economy
Plus R
Comfortable, economi-
cal driving
R Electric operation mode
is used as often as pos-
sible
R The ECO start/stop
function is available
R Double pulses in the
haptic accelerator
pedal, as an indication
to release the accelera-
tor pedal (Y page 286)
R After the accelerator
pedal has been
released, the coasting
characteristics of the
vehicle are adapted to
the traffic conditions. For further information on the automatic drive
program, see (Y page 202). Manual drive program M
In addition to automatic drive programs
Eand
S, you can switch to manual drive program M
using the steering wheel paddle shifters.
In manual drive program M, you can briefly
change gear yourself by using the steering
wheel paddle shifters. The transmission must be in position D. In manual drive program M
the internal combustion engine is always
switched on.
Activating when driving with the electric
motor:
X Pull the left or right steering wheel paddle
shifter (Y page 201).
The combustion engine is switched on.
Manual drive program Mis temporarily acti-
vated. The selected gear and Mappear in
the multifunction display.
Activating when driving with the combustion
engine:
X Pull the left or right steering wheel paddle
shifter (Y page 201).
Manual drive program Mis temporarily acti-
vated. The selected gear and Mappear in
the multifunction display.
The ECO start/stop function is not available
in manual drive program M.
Haptic accelerator pedal General notes
The haptic accelerator pedal helps you to
reduce the fuel consumption and emissions
of your vehicle.
There are two different functions available for this purpose:
R an additional point of resistance in E-MODE
operating mode (Y page 280)
R a double impulse in E+operating mode
(Y page 285) 286
PLUG-IN HYBRID operationDriving and parking

Automatic engine start
The automatically switched-off internal com-
bustion engine starts automatically in certain situations, if:
R the power demand from the driver via the
accelerator pedal is greater than the elec-
tric motor alone can provide
R the driver switches to drive program Sor M
R the condition of charge of the high-voltage
battery has reached the lower limit
R the settings of the automatic climate con-
trol require it, e.g. at external temperatures
above 30 †
Overrun mode
In overrun mode, the combustion engine is
switched off and is disconnected from the
drive train. The electric motor:
R generates low thrust, which corresponds to
the overrun mode of an active combustion
engine
R functions as a generator and produces the
necessary energy for the auxiliary consum-
ers and charges the high-voltage battery
Overrun mode is possible in the following
speed range:
R in drive program Ebelow 130 km/h
R in drive program E+below 180 km/h
In drive program E+, after the accelerator
pedal has been released the coasting char-
acteristics of the vehicle are adapted to the
traffic conditions. Further information about
the haptic accelerator pedal (Y page 286).
Map-based energy management For map-based energy management, the sys-
tem factors in information about the expec-
ted route when route guidance is active.
The information on the route is provided by
COMAND and includes the following:
R road categories
R speed limitations
R data on downhill gradients The use of electric energy is automatically
optimally distributed from the beginning to
the end of the journey, using information
about the route. The distribution is pre-emp-
tive and takes into consideration:
R the sections of the journey ahead
R the energy consumption on the whole route
The condition of charge of the high-voltage
battery is thus systematically controlled. In
addition, the control function takes into
account that:
R the fuel saving through the use of electrical
energy can vary, dependent on the route
(e.g. urban, interurban or highway)
R the use of electrical energy is held available
for electric driving, particularly for urban
routes
The vehicle thus automatically selects the
optimum driving mode for the respective sec- tion of the route.
Map-based energy management is available
under the following conditions:
R drive program E+is selected
R HYBRID driving mode is selected
R active route guidance is activated
R suitable map data is available
When map-based energy management is
engaged, the area in front of the vehicle in the
multifunction display will be green. Parking
X Apply the electric parking brake.
The red !indicator lamp in the instru-
ment cluster lights up.
X Use the DIRECT SELECT lever to shift the
automatic transmission to P.
X Switch the ignition off.
The READY indicator in the instrument clus-
ter goes out.
Further information on parking and switching off the internal combustion engine
(Y page 221). PLUG-IN HYBRID operation
289Driving and parking Z